Lec36 Fill In Notes (1)

Lec36 Fill In Notes (1) - Lec36 Fill In Notes Solar energy...

Info icon This preview shows pages 1–2. Sign up to view the full content.

Lec36 Fill In Notes Solar energy: Max current flow: 2.5 x 10 21 electrons per second [e/s] Def: 1 ampere = 1 A = 6.241 x 10 18 e/s Distribution of photon energy (approx) ~ Weibull (3,3) where x is energy in 10 -19 joule Example: What percent of photons have energy < 1 x 10 -19 J? Let x = 1 P(X <= 1) = 1 – exp(-(1/3)^3) = 0.036 For PV panel power Recall ( from physics ): Power = Current * Voltage Example: Suppose current = 1 A/m 2 , voltage = 0.5 V Then P = IV = 0.5 watt/m 2 Wind energy Recall ( from physics ): Energy = Power * Time [e.g., watts * hours = watt-hours]
Image of page 1

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Define ρ = density of air 1.1 kg/m 3 h bin = number of hours/yr in bin V bin as bin avg wind speed [m/s] A = swept area of wind turbine [m 3 ] Then energy in bin E bin equals [watt-hr/yr]: Empirical E bin : download table of hours from web Theoretical E bin : use Weibull CDF. See Lec.18 Let x lo & x hi = lower and upper windspeeds for bin, resp.; x avg = average of x lo & x hi Then >>> simplify and solve...
View Full Document

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern